* BPrivate::ConvertBits() did not take the source or destination bits length

into account when copying to the same color space (new code isn't that fast,
  but it works).
* BBitmap::ImportBits() did not take the specified offset into account at all.
  This fixes bug #313.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16812 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/Bitmap.cpp

@@ -513,8 +513,8 @@ BBitmap::ImportBits(const void *data, int32 length, int32 bpr, int32 offset,
 	if (bpr < 0)
 		bpr = get_bytes_per_row(colorSpace, width);
 
-	return BPrivate::ConvertBits(data, fBasePtr, length, fSize, bpr,
-		fBytesPerRow, colorSpace, fColorSpace, width,
+	return BPrivate::ConvertBits(data, (uint8*)fBasePtr + offset, length,
+		fSize - offset, bpr, fBytesPerRow, colorSpace, fColorSpace, width,
 		fBounds.IntegerHeight() + 1);
 }